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北部湾盆地地温异常影响因素探讨 预览 被引量:2

ANALYSIS OF GEOTHERMAL ANOMALIES IN BEIBUWAN BASIN
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摘要 北部湾盆地地温场的不均一性除与基岩埋深有一定关系外,在很大程度上与活动热流体有关。含油气钻孔或含油气构造带大多分布在地温梯度和热流值较高的部位。压实作用及烃的生成所产生的压力促使热流体沿同生断裂以“幕式喷发”的方式发生运移,而流体所携带的巨大热量却不受盖层和构造圈闭等因素的影响向上传递,从而导致在地表(海底)形成高热流异常。 Calculation of geothermal gradient and hot flow values indicates that the temperature field of Beibuwan Basin is inhomogeneous. Geothermal anomalies are in relation with burial depth of bed rocks, but they are mainly caused by hydrothermal fluid activities. Oil (gas)-bearing wells or oil(gas)fields are usually associated with higher thermal gradient and hot flow values. The anomalous pressure produced from compaction of argillaceous rocks andgeneration of hydrocarbon promotes hydrothermal fluid to burst episodically along syngenetic faults. Heat entrained by hydrothermal fluid continues to conduct and convect right up to the surface where higher hot flow anomaly occures. Hydrothermal fluid activities not only make temperature field inhomogeneous, but also affect the maturation of source rocks. Vitrinite reflectance values in range of oil-generation windows are higher than the values they should be.
作者 康西栋 李思田 李雨梁 胡忠良 Kang Xidong Li Sitian (China University of Ge.osciences, Beijing, 100083)Li Yuliang Hu Zhongliang (Nanhai West Oil Corporation, Zhanjiang, 524057)
出处 《地质科技情报》 CAS CSCD 北大核心 1993年第4期 69-74,共6页 Geological Science and Technology Information
基金 国家自然科学基金资助
关键词 北部湾盆地 地温异常 影响因素 geotermal gradient, hot flow active, hydrothermal fluid, Beibuwan Basin
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  • 1汪集旸,黄少鹏.中国大陆地区大地热流数据汇编[J]地质科学,1988(02). 被引量:1

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